Addams Family Values (1993) on Netflix

Pugsley and Wednesday Addams aren't very happy with the new addition to the family: their new baby brother, Pubert. Morticia is restless, and Gomez only wants her to be happy, so he tries to fix everyone's problems by hiring a nanny. The Addams' finally find the perfect nanny in Debbie: a seemingly innocent woman with an impeccable wardrobe and a way with her hands. She charms the family, especially Uncle Fester, who is head-over-heels for her. However, Wednesday and Pugsley see through her sensual facade: Debbie is only after Fester for his money. Before they can rat on her, she has the kids sent off to summer camp, as she and Fester get married. While she tries (several times) to kill Fester and make it look like an accident, Pugsley and Wednesday must battle ever-cheery camp directors and spoiled rich kids to get back to their family and warn them of Debbie's plans.